Leptons in Life Everything on Earth is made up of small particles called "matter". Atoms, made of electrons and nuclei bound by the electromagnetic force, make up matter. The electrons have negative electric charge, and their mass is exceptionally small compared to the nuclei, which are made up of protons and neutrons. There are only two kinds of particles that are composed in the universe, viewed as the "elementary particles" of life. These basic building blocks of matter are leptons and…
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